From 17aa684ff7941f44af57cbb1c7b46bf5dc4f4fe2 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Thu, 18 Jan 2024 22:08:16 +1000 Subject: [PATCH] ppc/spapr: Remove copy-paste from pa-features TCG does not support copy/paste instructions. Remove it from ibm,pa-features. This has never been implemented under TCG or practically usable under KVM, so it won't be missed. Reviewed-by: Harsh Prateek Bora Signed-off-by: Nicholas Piggin --- hw/ppc/spapr.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 3108d7c532..4192cd8d6c 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -237,6 +237,10 @@ static void spapr_dt_pa_features(SpaprMachineState *spapr, * SSO (SAO) ordering is supported on KVM and thread=single hosts, * but not MTTCG, so disable it. To advertise it, a cap would have * to be added, or support implemented for MTTCG. + * + * Copy/paste is not supported by TCG, so it is not advertised. KVM + * can execute them but it has no accelerator drivers which are usable, + * so there isn't much need for it anyway. */ uint8_t pa_features_206[] = { 6, 0, @@ -260,8 +264,8 @@ static void spapr_dt_pa_features(SpaprMachineState *spapr, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 24 - 29 */ /* 30: MMR, 32: LE atomic, 34: EBB + ext EBB */ 0x80, 0x00, 0x80, 0x00, 0xC0, 0x00, /* 30 - 35 */ - /* 36: SPR SO, 38: Copy/Paste, 40: Radix MMU */ - 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 36 - 41 */ + /* 36: SPR SO, 40: Radix MMU */ + 0x80, 0x00, 0x00, 0x00, 0x80, 0x00, /* 36 - 41 */ /* 42: PM, 44: PC RA, 46: SC vec'd */ 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 42 - 47 */ /* 48: SIMD, 50: QP BFP, 52: String */